“See every photographic subject moves,” Roswell explained, “even if it’s standing still. It breathes, light bounces off, something. Snapping a photograph is like what the math professors call ‘differentiating’ an equation of motion—freezing that moment into the very small piece of time it takes the shutter to open and close. So we figured—if shooting a photo is like taking a first derivative, then maybe we could find some way to to do the reverse of that, start with the still photo and integrate it, recover its complete primative and release it back into action… even back into life…”